SierraApexMtn
New member
Need some help! A friend's kid was riding a 1993 Exciter 570 when it stopped and puked out most all the coolant. Not being there I don't have the answers as to why. Water pump is pumping but I did notice that the idiot light wire from the sensor was disconnected. Head was warped bad but the cylinders and pistons did not get out of round. Thermostat got so hot it actually bent it in the open position.
Surfaced the head, new gaskets, and put it back together. Now it will start and run for 15-20 seconds and stall. Further attempts and you just get a momentary pop and that's it. Let it set for a few hours and same sequence again. Ideas? Could it have gotten so hot as to have affected the seals? Would it act like that? Messed with a lot of these motors but never ran into this. Lots of spark, compression, and fuel too
Thanks for any ideas!!
Gary
Surfaced the head, new gaskets, and put it back together. Now it will start and run for 15-20 seconds and stall. Further attempts and you just get a momentary pop and that's it. Let it set for a few hours and same sequence again. Ideas? Could it have gotten so hot as to have affected the seals? Would it act like that? Messed with a lot of these motors but never ran into this. Lots of spark, compression, and fuel too
Thanks for any ideas!!
Gary
no1chevyboy
New member
need rebuild rings are probably seized from piston scoreing
tedgoesfast
New member
tear it down must be more damage
SierraApexMtn
New member
A little more info....
Guess I wasn't real clear... I did remove the cylinders and pistons and had them checked out at a machine shop. The are perfect.
Guess my concern is if getting real hot could make the crank seals fail. There is no evidence of it even being hot from the head down so that seems like a remote possibility.
Thoughts, ideas??
Thanks, Gary
Guess I wasn't real clear... I did remove the cylinders and pistons and had them checked out at a machine shop. The are perfect.
Guess my concern is if getting real hot could make the crank seals fail. There is no evidence of it even being hot from the head down so that seems like a remote possibility.
Thoughts, ideas??
Thanks, Gary
no1chevyboy
New member
check your fuel system may be partially plugged
If it was low enough on coolant to over heat, it will then puke out coolant. Had you check or done anything with the coolant system lately